Most leaders in the tech industry owe their wealth to founding equity stakes in their platforms, which Google’s Sundar Pichai does not have.

Many of Pichai's recent sales were made under a regulatory filing which allows stock sales to be set up in advance by officers of publicly-listed companies to avoid any accusations of inside trading.

The S&P 500 and the Nasdaq notched record high closes on Thursday as robust results from Google parent Alphabet fueled optimism about other heavyweight artificial intelligence stocks, while Tesla slumped after the electric vehicle maker's results disappointed investors.

For the quarter, Google is expected to post adjusted earnings per share of $2.17 on revenue excluding traffic acquisition costs (TAC) of $79.6 billion, an 11.6% jump versus the same period last year when the company posted revenue of $71.3 billion, according to analyst consensus data from Bloomberg.

After months of underperforming their tech peers, Alphabet Inc. shares are finally showing signs of life as investors bet that a strong earnings performance will outweigh concerns about a looming antitrust ruling.

Alphabet , faced with unprecedented threats from AI rivals, will be keen to assure investors this week that the company's own spending on the technology is helping it dig a deeper moat around its search and advertising businesses.

When Alphabet (NASDAQ:GOOG) (NASDAQ:GOOGL) reports quarterly results on Wednesday, the focus would be on the tech giant’s advertising sales, amid rising threat to its search business and a key antitrust ruling next month.